Re: 1982 Johnson 7.5 Spark 1 Cylinder

[benchrascal]

Generally the problem with those is not a component but the ground between the black box and the block.I have owned and serviced well over a hundred of those and I can count on one hand the times that something besides that was at fault.Take every wire and give it a little tug to see if the insulation is hiding a rotted core ,check everywhere you can think of before you replace any component .I often run them at dusk to see where they are arcing ,helps narrow down the search.